16805047601 has 2 divisors, whose sum is σ = 16805047602. Its totient is φ = 16805047600.

The previous prime is 16805047583. The next prime is 16805047603. The reversal of 16805047601 is 10674050861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15361123600 + 1443924001 = 123940^2 + 37999^2 .

It is an emirp because it is prime and its reverse (10674050861) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16805047601 is a prime.

Together with 16805047603, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16805047603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8402523800 + 8402523801.

It is an arithmetic number, because the mean of its divisors is an integer number (8402523801).

Almost surely, 2^16805047601 is an apocalyptic number.

It is an amenable number.

16805047601 is a deficient number, since it is larger than the sum of its proper divisors (1).

16805047601 is an equidigital number, since it uses as much as digits as its factorization.

16805047601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 38.

The spelling of 16805047601 in words is "sixteen billion, eight hundred five million, forty-seven thousand, six hundred one".